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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
short note on cumulative error
Q. Explain the basic architecture of digital switching systems. Explain in detail companding. Ans: A simple N X N time division space switch is displayed in Figure. Switch
Define the XOR GATE - Microprocessor? The XOR GATE is a alike to an OR gate except for the instance when all the inputs are high. With a XOR gate when all the inputs are high t
Q. Describe an integrator circuit ? A circuit in which output voltage is directly proportional to the integral of the input is known as an integrating circuit. An integrating c
Advantages of High level Languages a.It is easy to learn write and debug the program written in high level languages. b.Programs are more legible as compared to m
Turn off Time This is also known as gate controlled turn on time. The time interval between a specified point at the beginning of the gate pulse and the instant wh
You have been hired by Serge Brink and Larry Park to assist them in the evaluation of a recently issued term sheet from Global VC Partners. The new venture is an Internet startu
Q. (a) Consider a three-phase star or wye half-wave recti?er with a purely resistive load R. Determine: (i) efficiency, (ii) formfactor, (iii) ripple factor, (iv) TUF, and (v) PIV
What Is the Concept of Dual beam CRO ?
write the note on gunn diode and ats applications
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